x86/ioperm: Extend IOPL config to control ioperm() as well

If iopl() is disabled, then providing ioperm() does not make much sense.

Rename the config option and disable/enable both syscalls with it. Guard
the code with #ifdefs where appropriate.

Suggested-by: Andy Lutomirski <luto@kernel.org>
Signed-off-by: Thomas Gleixner <tglx@linutronix.de>

arch/x86/kernel/process.c

@@ -322,6 +322,7 @@ void arch_setup_new_exec(void)
 	}
 }
 
+#ifdef CONFIG_X86_IOPL_IOPERM
 static inline void tss_invalidate_io_bitmap(struct tss_struct *tss)
 {
 	/*
@@ -409,6 +410,9 @@ void tss_update_io_bitmap(void)
 		tss_invalidate_io_bitmap(tss);
 	}
 }
+#else /* CONFIG_X86_IOPL_IOPERM */
+static inline void switch_to_bitmap(unsigned long tifp) { }
+#endif
 
 #ifdef CONFIG_SMP